section.index{ width: 1206px; height: 750px; background-color: #cccccc;}
section.index p.blank{ height: 40px;}
section.index .box{width: 500px; height: 300px; background-color: #555; padding: 40px; background-image: url(../images/common/turn_hor.png); background-size: auto; margin-left: 40px;}
section.index p.txt{ display: block; width: 580px; font-size: 28px; text-align: center; margin-left: 40px; margin-top: 40px;}

.btn1{position: absolute; left: 30px; top: 30px; width: 70px; height: 70px; background-image: url(../images/common/bgm_on.png);}
.btn2{position: absolute; left: 50%; top: 50%; width: 70px; margin-left: -35px; height: 70px; margin-left: -35px; background-image: url(../images/common/bgm_on.png);}
.btn3{position: absolute; right: 30px; bottom: 30px; width: 70px; height: 70px; background-image: url(../images/common/bgm_on.png);}
